Asking “Why?” of grave evil is always going to get you an unsatisfactory answer because evil is fundamentally absurd. That’s why Paul calls it a mystery. I think Law et al have been trying to give “reasons” for their actions over the months (“Because the lawyers told me to do it. Because the psychologists said I should.” etc.) Such “reasons” are bad reasons because sin is, at bottom, opposed to reason and can therefore never be reconciled with it.
You see the same struggle with people who try to “make sense” of the Holocaust or write books with titles like “Explaining Hitler”. There’s no explanation because “explaining” mean “giving a rational account for one’s actions and there is no rational way to explain deliberate action done in opposition to Him who is Truth.